{
	"$schema":"http://json-schema.org/draft-03/schema#",
	"id": "http://schemas.opengis.net/gsr/1.0/polygon.json",
	
	"title":"polygon",
	"type":"object",
	"extends":{
		"$ref":"http://schemas.opengis.net/gsr/1.0/geometry.json"
	},
	"properties":{
		"rings":{
			"title":"rings",
			"type":"array",
 		"required":true,
			"items":{
 				"title":"ring",
 				"type":"array",
 				"items":{
 					"title":"direct position [x,y]",
 					"type":"array",
 					"items":{
 						"title":"ordinate",
 						"type":"number"}}}}, 
		"spatialReference":{
			"$ref" : "http://schemas.opengis.net/gsr/1.0/spatialreference.json"}
	}
}